package com.greensock.easing {
	public class Expo {
		public static function easeIn(t : Number, b : Number, c : Number, d : Number) : Number {
			return (t == 0) ? b : c * Math.pow(2, 10 * (t / d - 1)) + b - c * 0.001;
		}

		public static function easeOut(t : Number, b : Number, c : Number, d : Number) : Number {
			return (t == d) ? b + c : c * (-Math.pow(2, -10 * t / d) + 1) + b;
		}

		public static function easeInOut(t : Number, b : Number, c : Number, d : Number) : Number {
			if (t == 0) return b;
			if (t == d) return b + c;
			if ((t /= d * 0.5) < 1) return c * 0.5 * Math.pow(2, 10 * (t - 1)) + b;
			return c * 0.5 * (-Math.pow(2, -10 * --t) + 2) + b;
		}
	}
}